VIBRATION TECHNIQUE FOR ROT DETECTION IN WOOD POLES AND TREES

摘要

A method of detecting for the presence of decay in a wooden pole, and which involves subjecting the pole to a mechanical vibrational force at a frequency falling within the sonic frequency range, measuring the level of energy emerging from the pole at a number of axially spaced points along the length of the pole (the energy being measured in terms of R.M.S. velocity or acceleration of vibrations) and comparing the measurements of the emergent energy at the respective points.